<template>
    <el-container class="home-container">
        <el-header>
            <div>
                <img src="../assets/images/heima.png" alt="">
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="isCollapse ? '64px':'200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <!-- 侧边栏菜单区域 -->
                <el-menu
                    :default-active="activePath"
                    class="el-menu-vertical-demo"
                    background-color="#373d41"
                    text-color="#fff"
                    active-text-color="#409eff"
                    :unique-opened="true"
                    :collapse="isCollapse"
                    :collapse-transition="false"
                    router> 
                    <!-- unique-opened:是否只保持一个子菜单的展开 -->
                    <!-- 一级菜单 -->
                    <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
                        <!-- 一级菜单模板区域 -->
                        <template slot="title">
                            <!-- 图标 -->
                            <i :class="iconsObj[item.id]"></i>
                            <!-- 文本 -->
                            <span> {{item.authName}} </span>
                        </template>


                        <!-- 二级菜单 -->
                        <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children" :key="subItem.id" 
                        @click="saveNaveState('/' + subItem.path)">
                            <!-- 图标 -->
                            <i class="el-icon-menu"></i>
                            <!-- 文本 -->
                            <span> {{subItem.authName}} </span>
                        </el-menu-item> 
                    </el-submenu>
                </el-menu>
            </el-aside>
            <!-- 主体内容 -->
            <el-main>
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
export default {
    data() {
        return {
            // 左侧菜单数据
            menulist: [],
            // 一级菜单的图标
            iconsObj: {
                '125': 'iconfont icon-user',
                '103': 'iconfont icon-tijikongjian',
                '101': 'iconfont icon-shangpin',
                '102': 'iconfont icon-danju',
                '145': 'iconfont icon-baobiao'
            },
            isCollapse: false,
            // 被激活的链接地址
            activePath: ''
        }
    },
    created() {
        this.getMenuList(),
        this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods: {
        logout() {
            // 清空token
            window.sessionStorage.clear()
            // 跳转到登录页
            this.$router.push('/login')
        },
        // 获取所有的菜单
        async getMenuList() {
            const {data: res} = await this.$http.get('menus',this.menulist)
            console.log(res);
            if(res.meta.status != 200) return this.$message.error(res.meta.msg)
            this.menulist = res.data
        },
        toggleCollapse() {
            this.isCollapse = !this.isCollapse
        },
        // 保存链接的激活状态
        saveNaveState(activePath) {
            window.sessionStorage.setItem('activePah',activePath)
            this.activePath = activePath
        }
    }
}
</script>

<style lang="less" scoped>
.home-container{
    height: 100%;
}
.el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    color: #fff;
    align-items: center;
    > div {
        display: flex;
        align-items: center;
    }
}
.el-aside{
    background-color: #333744;
    .el-menu{
        border-right: none;
        border-right-color: none;
    }
}
.toggle-button{
    background-color: #4a5064;
    text-align: center;
    color: #fff;
    line-height: 25px;
    font-size: 10px;
    letter-spacing: 0.2em; // 设置间距
    cursor:pointer;
}
.el-main{
    background-color: #eaedf1;
}
</style>